Renesas X9259UV24IZ-2.7T1

Overview

X9259UV24IZ-2.7T1 from Renesas (formerly Intersil) is a quad digitally controlled potentiometer (XDCP™) IC with 256-tap resolution, 2-wire serial interface, 50kΩ end-to-end resistance, and -40°C to +85°C industrial temperature range. It integrates four independent DCPs in a single 24-pin TSSOP package, each with volatile wiper counter registers and four nonvolatile data registers. It is used for precision gain control in audio amplifiers, DC bias trimming in RF power amplifiers, and programmable reference voltage generation in sensor signal conditioning circuits.

For engineers reviewing the X9259UV24IZ-2.7T1 datasheet, X9259UV24IZ-2.7T1 pinout, X9259UV24IZ-2.7T1 application, or X9259UV24IZ-2.7T1 equivalent, key selection criteria include its 2.7V–5.5V single-supply operation, 0.4% resolution, 100Ω typical wiper resistance at 5V, 100-year data retention, and hardware write-protect (WP) pin for register integrity in embedded systems.

Technical Context

The X9259UV24IZ-2.7T1 implements four independent digital potentiometers using resistor arrays and CMOS switches, each controlled via an 8-bit volatile Wiper Counter Register (WCR). Each DCP supports three-terminal potentiometer or two-terminal variable resistor configurations, with RH/RL/RW terminals per channel.

It uses a standard 2-wire (I²C-compatible) bus with SDA/SCL, four device address pins (A0–A3), and a dedicated hardware write-protect (WP) input. At power-up, each WCR loads the default value from its DR00 register, enabling deterministic startup behavior without host intervention.

Key Specifications

Pinout & Package

Package: 24-lead TSSOP (RoHS compliant, M24.173 drawing), -40°C to +85°C operating range.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled potentiometer applications.

Compared with AD5242BRUZ10 and MCP42010-I/P, the X9259UV24IZ-2.7T1 delivers higher channel density, superior long-term reliability (100k cycles, 100-year retention), and hardware-level register protection-making it optimal for industrial and automotive systems requiring unattended recalibration and fail-safe startup behavior.

Availability

X9259UV24IZ-2.7T1 is available at Aetrix Electronics and suitable for industrial sensor calibration, RF power amplifier biasing, audio gain control, and programmable voltage regulation requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for X9259UV24IZ-2.7T1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation (acquired Intersil in 2017) is a global semiconductor leader specializing in microcontrollers, analog, power management, and timing solutions for industrial, automotive, and communications markets.

The X9259UV24IZ-2.7T1 belongs to Renesas' XDCP™ family of digitally controlled potentiometers, designed specifically for replacing mechanical trimpots in precision analog adjustment applications where programmability, reliability, and nonvolatile configuration storage are essential.

FAQ

What is the operating voltage range of the X9259UV24IZ-2.7T1?

The X9259UV24IZ-2.7T1 operates from 2.7V to 5.5V, making it compatible with both 3.3V and 5V logic systems. This wide supply range eliminates the need for level shifters in mixed-voltage designs and ensures robust functionality across varying power rail tolerances. The "-2.7" suffix explicitly denotes this extended low-voltage capability, distinguishing it from the standard 5V±10% version.

How many independent potentiometers does the X9259UV24IZ-2.7T1 integrate?

The X9259UV24IZ-2.7T1 integrates four fully independent digitally controlled potentiometers (DCPs) on a single monolithic CMOS die. Each DCP features its own RH, RL, and RW terminals, plus dedicated volatile Wiper Counter Registers and four nonvolatile Data Registers-enabling simultaneous, isolated analog adjustments for multi-channel systems like stereo audio or quad-sensor interfaces.

Does the X9259UV24IZ-2.7T1 support nonvolatile storage of wiper settings?

Yes, the X9259UV24IZ-2.7T1 provides four nonvolatile Data Registers per DCP (DR00–DR03, DR10–DR13, etc.), each retaining wiper position data for 100 years. These registers can be written via I²C and transferred to volatile Wiper Counter Registers on command or automatically at power-up from DR#0, ensuring repeatable, power-loss-resilient configuration.

What is the purpose of the WP pin on the X9259UV24IZ-2.7T1?

The WP (Write Protect) pin on the X9259UV24IZ-2.7T1 is an active-low hardware input that disables all nonvolatile writes to the Data Registers when asserted. This prevents accidental or malicious corruption of calibrated settings during firmware updates, ESD events, or brown-out conditions-enhancing system reliability in mission-critical industrial and automotive applications.

Can the X9259UV24IZ-2.7T1 be used as a two-terminal variable resistor?

Yes, the X9259UV24IZ-2.7T1 supports both three-terminal potentiometer and two-terminal variable resistor configurations. By connecting either RH or RL to the same node as RW (or leaving one terminal open), each DCP functions as an adjustable rheostat-ideal for current-limiting, LED dimming, or programmable load applications where only resistance variation-not voltage division-is required.